<h2>Purchaseorder 表单</h2>
<form method="post">
<?php if(isset($item)): ?>
<input type="hidden" name="id" value="<?= $item['id'] ?>">
<?php endif; ?>
<label>ID：</label> <input type="text" name="id" value="<?= $item['id'] ?? '' ?>"><br>
<input type="submit" value="提交">
</form>
